As a long time Cubase (and logic) user, I cant even think of a scenario where I would do either. I say that to further understanding-not as judgement that theres anything wrong with doing whatever youre doing that way. The reason i can think of that you might want all the lengths the same is drum editing, which is why theres been an actual drum editor for 20 years.
Are you going to properly intonate strings? Use the per note drum editor mappingst to try sending your kick to another VI all together? Use the, IMO, better score editing to collect string or horn parts onto a great scale to view/edit them as a chord despite midi requiring they be on different tracks/channels? Have you set up articulation maps for your instruments? I know you can do that in Logic as of 6 months ago, but its been in Cubase for a decade or more.
If we flip the tables, talk tempo mapping....Logic (V10.4+) beats its automatic detection, but its still kludgey to FIX wher it misdetects....thats a BIG deal in my world, where anything midi is done against human played audio (usually sans click)...and its maddening to me that one has a better algo for detction and the other makes much quicker work of manually adjusting until the click sinks into the pocket. Which is better? Making a better first guess or making quick and easy work of fine tuning it by ear? That depends completely on WHY youre mapping tempo...and maybe how well versed you are in the concept of a pulse vs an attack transient in music.
If “midi editing”, for you, is stuff you do in the keyroll, i dont think youll find a ton of tangilble difference. To me, its about the things nothing else can do....and a few it just does quicker/easier.
I hope this post is taken as intended, which is to better understand at least what I mean when I talk about “better at midi”. I use midi sequencing for three things: fake drums during the songwriting/demoing process...Logic is so absurdly ahead here its not even comparable with the auto tempo mapping AI based Drummer....and string/horn section arrangements. Here, the inverse is truer and Cubase is more capable at least for how I work.